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Bicircular polarized broad-band antenna radiating element used for large-angle scanning phased array

A dual circularly polarized, broadband antenna technology, applied in the direction of radiating element structure, electrical components, waveguide-type devices, etc., can solve the problems of large spacing between antenna radiating elements and the inability to apply wide-angle scanning phased array, etc. The effect of cross-sectional area

Active Publication Date: 2012-09-26
XIAN INSTITUE OF SPACE RADIO TECH
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  • Description
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AI Technical Summary

Problems solved by technology

However, the distance between the radiating elements of this antenna is relatively large, so it cannot be applied to wide-angle scanning phased arrays

Method used

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  • Bicircular polarized broad-band antenna radiating element used for large-angle scanning phased array
  • Bicircular polarized broad-band antenna radiating element used for large-angle scanning phased array
  • Bicircular polarized broad-band antenna radiating element used for large-angle scanning phased array

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Embodiment Construction

[0024] Such as figure 1 Shown is a structural diagram of the radiation unit of the phased array antenna of the present invention.

[0025] From a functional point of view, the radiation unit of the phased array antenna of the present invention is mainly composed of a medium-loaded broadband circular polarizer and a medium-loaded square-mouth radiation unit, specifically, a waveguide shell 1, a left-handed circularly polarized input port 2, a right-handed The circular polarization input port 3, the circular polarization diaphragm 4, the filling medium 5, the choke groove 6 and the impedance matching medium layer 7 are composed. The waveguide housing 1 has a square structure, and the impedance matching dielectric layer 7 is a square or circular thin plate, and the impedance matching dielectric layer 7 is closely attached to the left end surface of the waveguide housing 1; the filling medium 5 is close to the impedance matching dielectric layer 7 There is an annular choke groove...

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Abstract

The invention relates to a bicircular polarized broad-band antenna radiating element used for a large-angle scanning phased array, which comprises a waveguide shell, a left-handed circular polarized input port, a right-handed circular polarized input port, a circular polarized membrane, packing media, a choke groove and an impedance matching dielectric layer, wherein the left-handed circular polarized input port and the right-handed circular polarized input port are symmetrical structures; the circular polarized membrane is arranged on the axle wire of the waveguide shell; after a linearly polarized signal input by the left-handed circular polarized input port or the right-handed circular polarized input port is converted into a circular polarized signal by the circular polarized membraneand after impedance matching is carried out on the circular polarized signal by the choke groove and the impedance matching dielectric layer, left-handed or right-handed circular polarized electromagnetic waves are externally radiated. The thickness of the impedance matching dielectric layer, the thickness and the radius of the choke groove and the distance between the choke groove and the impedance matching dielectric layer are optimized by electromagnetic simulation, and thereby, scanning dead zones can not be generated definitely under the condition of large-angle scanning.

Description

technical field [0001] The invention belongs to the field of microwave communication, and relates to a radiation unit of a circular polarization wide-angle scanning phased array antenna used in a low-orbit satellite communication system. Background technique [0002] Low-orbit communication satellites can use traveling wave tube amplifiers combined with low-gain antennas, mechanically scanned spot beam antennas, or spot beam phased array antennas for data transmission to the ground. Compared with the other two antennas, the phased array data transmission antenna has the advantages of low power consumption, high reliability, and no disturbance to the platform, so it has broad market prospects. [0003] In order to realize data transmission to the ground for as long as possible, the phased array antenna should be able to realize two-dimensional scanning, and the beam scanning range is ±67.5°cone angle. In order to avoid grating lobes during beam scanning, the maximum spacing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/36H01P1/17
Inventor 罗耀辉于晓乐杨红玺杨建超李正军
Owner XIAN INSTITUE OF SPACE RADIO TECH
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